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What is it? Overview Usage Side Effects and Warnings

Chasteberry Side Effects and Warnings

Safety Issues

There haven't been any detailed studies of the safety of chasteberry. However, its widespread use in Germany has not led to any reports of significant adverse effects, 1 other than a single case of excessive ovarian stimulation possibly caused by chasteberry. 2 Because it lowers prolactin levels, chasteberry is not an appropriate treatment for pregnant or nursing women. Safety in young children or those with severe liver or kidney disease has not been established.

There are no known drug interactions associated with chasteberry. However, it is quite conceivable that the herb could interfere with hormones or medications that affect the pituitary gland.

Interactions You Should Know About

If you are taking hormones or drugs that affect the pituitary, such as bromocriptine , it is possible that chasteberry might interfere with their action.


  1. Schulz V, Hansel R, Tyler VE. Rational Phytotherapy: A Physicians' Guide to Herbal Medicine. 3rd ed. Berlin, Germany: Springer-Verlag; 1998:243.
  2. Cahill DJ, Fox R, Wardle PG, Harlow CR. Multiple follicular development associated with herbal medicine. Hum Reprod. 9(8):1469-70.


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